46 lines
1.3 KiB
Ruby
46 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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class UserInteractedProject < ApplicationRecord
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belongs_to :user
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belongs_to :project
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validates :project_id, presence: true
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validates :user_id, presence: true
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CACHE_EXPIRY_TIME = 1.day
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class << self
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def track(event)
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# For events without a project, we simply don't care.
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# An example of this is the creation of a snippet (which
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# is not related to any project).
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return unless event.project_id
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attributes = {
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project_id: event.project_id,
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user_id: event.author_id
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}
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cached_exists?(**attributes) do
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transaction(requires_new: true) do
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where(attributes).select(1).first || create!(attributes)
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true # not caching the whole record here for now
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rescue ActiveRecord::RecordNotUnique
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# Note, above queries are not atomic and prone
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# to race conditions (similar like #find_or_create!).
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# In the case where we hit this, the record we want
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# already exists - shortcut and return.
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true
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end
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end
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end
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private
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def cached_exists?(project_id:, user_id:, &block)
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cache_key = "user_interacted_projects:#{project_id}:#{user_id}"
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Rails.cache.fetch(cache_key, expires_in: CACHE_EXPIRY_TIME, &block)
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end
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end
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end
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